Y Cable - Separates Side Imaging into Left and Right Beams - for Side Imaging products only. Allows the use of two side imaging transducers with one unit without the need for a transducer switch. Used in applications where the a plastic thru the hull transducer is required on a boat with a deep V hull. Can also be used if the motor or other items on the exterior of the boat may block one side of the transducer and distort readings.